well dependent on what 4 wheel drive system you have, the owners manual calls out at what time or milage intervals you should have the fluids changed. In my case i have a 4.7L w/ QDII which uses a set of clutch packs in the diff and I believe the transfer case. I change my front and rear diffs at 15,000 mile intervals and my transfer case I do at 30,000 miles. What they are talking about resealing is the rear diff. cover. when you change the rear diff fluid, you break the seal. So when reinstalling it, you have to reseal it. The transfer case and front diff. both have drain and fill plugs. The fluids are expensive and the price they quoted sounds about right for a dealer.
2006 Jeep Commander Limited 4.7L QD II.....[I]4in Super lift Supension lift, Defender Roof Rack, 285 70R17 ProComp Xtreme Mud Terrain II tires, JK wheels, Rear grab handles, polished throttle body, RCV performance CV Axles, 4X Guard belly guard, front guard, jeepinbyals upper control arms, borla cat back exhaust and LED off road bar 40" and dully D2's.
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Last edited by Gulf550; 07-20-2011 at 08:35 PM.